The first edition of MIL-HDBK-217 is dated 8 August 1962... 45 years ! happy birthday !
For this summer anniversary, I propose a contest.
The question of the constest is : To report the oldest possible product that has been designed using reliability and/or safety techniques.
I have read a story about the V1 missile during World War II. The german engineers were surprised about the low probability of success of the missile, because all parts of the missile had been designed with a life much greater than the flight time. This observation leads the engineers to understand the difference between MTBF and life time... Mmmm , this confusion is still common today !
Can someone report a previous use of reliability/safety techniques ?
Lambda
In very wide context, should we quote: Bayes, Pascal, Laplace...
The French architect and historian Eugène Viollet le Duc (1814-1879) had found a strange detail in a mediaval weapon of war, a huge catapult with a counterbalance of 26 tons (called "trebuchet" in French). After some studies, he understood that this was indeed a "fail safe device" (even if he didn′t use this words) to prevent hazardous effect in case of break of the main axle of the catapult. This is undoubtly an improvement of the weapon introduced by some (safety) engineer after several accidents...
Viollet le Duc has made some drawing of this detail: